/* * GStreamer * Copyright (C) 2003 Julien Moutte * Copyright (C) 2005,2006,2007 David A. Schleef * Copyright (C) 2008 Julien Isorce * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-glimagesink * * glimagesink renders video frames to a drawable on a local or remote * display using OpenGL. This element can receive a Window ID from the * application through the XOverlay interface and will then render video * frames in this drawable. * If no Window ID was provided by the application, the element will * create its own internal window and render into it. * * * Scaling * * Depends on the driver, OpenGL handles hardware accelerated * scaling of video frames. This means that the element will just accept * incoming video frames no matter their geometry and will then put them to the * drawable scaling them on the fly. Using the #GstXvImageSink:force-aspect-ratio * property it is possible to enforce scaling with a constant aspect ratio, * which means drawing black borders around the video frame. * * * * Events * * Through the gl thread, glimagesink handle some events coming from the drawable * to manage its appearance even when the data is not flowing (GST_STATE_PAUSED). * That means that even when the element is paused, it will receive expose events * from the drawable and draw the latest frame with correct borders/aspect-ratio. * * * * Examples * |[ * gst-launch -v videotestsrc ! "video/x-raw-rgb" ! glimagesink * ]| A pipeline to test hardware scaling. * No special opengl extension is used in this pipeline, that's why it should work * with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3. * |[ * gst-launch -v videotestsrc ! "video/x-raw-yuv, format=(fourcc)I420" ! glimagesink * ]| A pipeline to test hardware scaling and hardware colorspace conversion. * When your driver supports GLSL (OpenGL Shading Language needs OpenGL >= 2.1), * the 4 following format YUY2, UYVY, I420, YV12 and AYUV are converted to RGB32 * through some fragment shaders and using one framebuffer (FBO extension OpenGL >= 1.4). * If your driver does not support GLSL but supports MESA_YCbCr extension then * the you can use YUY2 and UYVY. In this case the colorspace conversion is automatically * made when loading the texture and therefore no framebuffer is used. * |[ * gst-launch -v gltestsrc ! glimagesink * ]| A pipeline 100% OpenGL. * No special opengl extension is used in this pipeline, that's why it should work * with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3. * |[ * gst-plugins-gl/tests/examples/generic/cube * ]| The graphic FPS scene can be greater than the input video FPS. * The graphic scene can be written from a client code through the * two glfilterapp properties. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gstglimagesink.h" GST_DEBUG_CATEGORY (gst_debug_glimage_sink); #define GST_CAT_DEFAULT gst_debug_glimage_sink static void gst_glimage_sink_init_interfaces (GType type); static void gst_glimage_sink_finalize (GObject * object); static void gst_glimage_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * param_spec); static void gst_glimage_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * param_spec); static GstStateChangeReturn gst_glimage_sink_change_state (GstElement * element, GstStateChange transition); static void gst_glimage_sink_get_times (GstBaseSink * bsink, GstBuffer * buf, GstClockTime * start, GstClockTime * end); static gboolean gst_glimage_sink_set_caps (GstBaseSink * bsink, GstCaps * caps); static GstFlowReturn gst_glimage_sink_render (GstBaseSink * bsink, GstBuffer * buf); static gboolean gst_glimage_sink_start (GstBaseSink * bsink); static gboolean gst_glimage_sink_stop (GstBaseSink * bsink); static gboolean gst_glimage_sink_unlock (GstBaseSink * bsink); static void gst_glimage_sink_xoverlay_init (GstXOverlayClass * iface); static void gst_glimage_sink_set_xwindow_id (GstXOverlay * overlay, gulong window_id); static void gst_glimage_sink_expose (GstXOverlay * overlay); static gboolean gst_glimage_sink_interface_supported (GstImplementsInterface * iface, GType type); static void gst_glimage_sink_implements_init (GstImplementsInterfaceClass * klass); static const GstElementDetails gst_glimage_sink_details = GST_ELEMENT_DETAILS ("OpenGL video sink", "Sink/Video", "A videosink based on OpenGL", "Julien Isorce "); static GstStaticPadTemplate gst_glimage_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_GL_VIDEO_CAPS ";" GST_VIDEO_CAPS_RGB ";" GST_VIDEO_CAPS_BGR ";" GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR ";" GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_BGRA ";" GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_ABGR ";" GST_VIDEO_CAPS_YUV ("{ I420, YV12, YUY2, UYVY, AYUV }")) ); enum { ARG_0, ARG_DISPLAY, PROP_CLIENT_RESHAPE_CALLBACK, PROP_CLIENT_DRAW_CALLBACK }; GST_BOILERPLATE_FULL (GstGLImageSink, gst_glimage_sink, GstVideoSink, GST_TYPE_VIDEO_SINK, gst_glimage_sink_init_interfaces); static void gst_glimage_sink_init_interfaces (GType type) { static const GInterfaceInfo implements_info = { (GInterfaceInitFunc) gst_glimage_sink_implements_init, NULL, NULL }; static const GInterfaceInfo xoverlay_info = { (GInterfaceInitFunc) gst_glimage_sink_xoverlay_init, NULL, NULL, }; g_type_add_interface_static (type, GST_TYPE_IMPLEMENTS_INTERFACE, &implements_info); g_type_add_interface_static (type, GST_TYPE_X_OVERLAY, &xoverlay_info); GST_DEBUG_CATEGORY_INIT (gst_debug_glimage_sink, "glimagesink", 0, "OpenGL Video Sink"); } static void gst_glimage_sink_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_details (element_class, &gst_glimage_sink_details); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_glimage_sink_template)); } static void gst_glimage_sink_class_init (GstGLImageSinkClass* klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstBaseSinkClass *gstbasesink_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gstbasesink_class = (GstBaseSinkClass *) klass; gobject_class->set_property = gst_glimage_sink_set_property; gobject_class->get_property = gst_glimage_sink_get_property; g_object_class_install_property (gobject_class, ARG_DISPLAY, g_param_spec_string ("display", "Display", "Display name", NULL, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_CLIENT_RESHAPE_CALLBACK, g_param_spec_pointer ("client_reshape_callback", "Client reshape callback", "Define a custom reshape callback in a client code", G_PARAM_WRITABLE)); g_object_class_install_property (gobject_class, PROP_CLIENT_DRAW_CALLBACK, g_param_spec_pointer ("client_draw_callback", "Client draw callback", "Define a custom draw callback in a client code", G_PARAM_WRITABLE)); gobject_class->finalize = gst_glimage_sink_finalize; gstelement_class->change_state = gst_glimage_sink_change_state; gstbasesink_class->set_caps = gst_glimage_sink_set_caps; gstbasesink_class->get_times = gst_glimage_sink_get_times; gstbasesink_class->preroll = gst_glimage_sink_render; gstbasesink_class->render = gst_glimage_sink_render; gstbasesink_class->start = gst_glimage_sink_start; gstbasesink_class->stop = gst_glimage_sink_stop; gstbasesink_class->unlock = gst_glimage_sink_unlock; } static void gst_glimage_sink_init (GstGLImageSink* glimage_sink, GstGLImageSinkClass* glimage_sink_class) { glimage_sink->display_name = NULL; glimage_sink->window_id = 0; glimage_sink->display = NULL; glimage_sink->stored_buffer = NULL; glimage_sink->clientReshapeCallback = NULL; glimage_sink->clientDrawCallback = NULL; } static void gst_glimage_sink_set_property (GObject* object, guint prop_id, const GValue* value, GParamSpec* pspec) { GstGLImageSink *glimage_sink; g_return_if_fail (GST_IS_GLIMAGE_SINK (object)); glimage_sink = GST_GLIMAGE_SINK (object); switch (prop_id) { case ARG_DISPLAY: { g_free (glimage_sink->display_name); glimage_sink->display_name = g_strdup (g_value_get_string (value)); break; } case PROP_CLIENT_RESHAPE_CALLBACK: { glimage_sink->clientReshapeCallback = g_value_get_pointer (value); break; } case PROP_CLIENT_DRAW_CALLBACK: { glimage_sink->clientDrawCallback = g_value_get_pointer (value); break; } default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_glimage_sink_finalize (GObject* object) { GstGLImageSink* glimage_sink; g_return_if_fail (GST_IS_GLIMAGE_SINK (object)); glimage_sink = GST_GLIMAGE_SINK (object); if (glimage_sink->caps) gst_caps_unref (glimage_sink->caps); g_free (glimage_sink->display_name); } static void gst_glimage_sink_get_property (GObject* object, guint prop_id, GValue* value, GParamSpec* pspec) { GstGLImageSink *glimage_sink; g_return_if_fail (GST_IS_GLIMAGE_SINK (object)); glimage_sink = GST_GLIMAGE_SINK (object); switch (prop_id) { case ARG_DISPLAY: g_value_set_string (value, glimage_sink->display_name); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /* * GstElement methods */ static GstStateChangeReturn gst_glimage_sink_change_state (GstElement* element, GstStateChange transition) { GstGLImageSink* glimage_sink; GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; GST_DEBUG ("change state"); glimage_sink = GST_GLIMAGE_SINK (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_PLAYING: break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); if (ret == GST_STATE_CHANGE_FAILURE) return ret; switch (transition) { case GST_STATE_CHANGE_PLAYING_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_READY: gst_glimage_sink_stop (GST_BASE_SINK (glimage_sink)); glimage_sink->fps_n = 0; glimage_sink->fps_d = 1; GST_VIDEO_SINK_WIDTH (glimage_sink) = 0; GST_VIDEO_SINK_HEIGHT (glimage_sink) = 0; break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; } /* * GstBaseSink methods */ static gboolean gst_glimage_sink_start (GstBaseSink* bsink) { //GstGLImageSink* glimage_sink = GST_GLIMAGE_SINK (bsink); GST_DEBUG ("start"); return TRUE; } static gboolean gst_glimage_sink_stop (GstBaseSink* bsink) { GstGLImageSink* glimage_sink; GST_DEBUG ("stop"); glimage_sink = GST_GLIMAGE_SINK (bsink); if (glimage_sink->stored_buffer) { gst_buffer_unref (glimage_sink->stored_buffer); glimage_sink->stored_buffer = NULL; } if (glimage_sink->display) { g_object_unref (glimage_sink->display); glimage_sink->display = NULL; } return TRUE; } static gboolean gst_glimage_sink_unlock (GstBaseSink* bsink) { //GstGLImageSink* glimage_sink = GST_GLIMAGE_SINK (bsink); GST_DEBUG ("unlock"); return TRUE; } static void gst_glimage_sink_get_times (GstBaseSink* bsink, GstBuffer* buf, GstClockTime* start, GstClockTime* end) { GstGLImageSink* glimagesink; glimagesink = GST_GLIMAGE_SINK (bsink); if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) { *start = GST_BUFFER_TIMESTAMP (buf); if (GST_BUFFER_DURATION_IS_VALID (buf)) *end = *start + GST_BUFFER_DURATION (buf); else { if (glimagesink->fps_n > 0) { *end = *start + gst_util_uint64_scale_int (GST_SECOND, glimagesink->fps_d, glimagesink->fps_n); } } } } static gboolean gst_glimage_sink_set_caps (GstBaseSink* bsink, GstCaps* caps) { GstGLImageSink* glimage_sink; gint width; gint height; gboolean ok; gint fps_n, fps_d; gint par_n, par_d; GstVideoFormat format; GstStructure *structure; gboolean is_gl; GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps); glimage_sink = GST_GLIMAGE_SINK (bsink); structure = gst_caps_get_structure (caps, 0); if (gst_structure_has_name (structure, "video/x-raw-gl")) { is_gl = TRUE; format = GST_VIDEO_FORMAT_UNKNOWN; ok = gst_structure_get_int (structure, "width", &width); ok &= gst_structure_get_int (structure, "height", &height); } else { is_gl = FALSE; ok = gst_video_format_parse_caps (caps, &format, &width, &height); } ok &= gst_video_parse_caps_framerate (caps, &fps_n, &fps_d); ok &= gst_video_parse_caps_pixel_aspect_ratio (caps, &par_n, &par_d); if (!ok) return FALSE; GST_VIDEO_SINK_WIDTH (glimage_sink) = width; GST_VIDEO_SINK_HEIGHT (glimage_sink) = height; glimage_sink->is_gl = is_gl; glimage_sink->format = format; glimage_sink->width = width; glimage_sink->height = height; glimage_sink->fps_n = fps_n; glimage_sink->fps_d = fps_d; glimage_sink->par_n = par_n; glimage_sink->par_d = par_d; if (!glimage_sink->window_id) gst_x_overlay_prepare_xwindow_id (GST_X_OVERLAY (glimage_sink)); return TRUE; } static GstFlowReturn gst_glimage_sink_render (GstBaseSink* bsink, GstBuffer* buf) { GstGLImageSink* glimage_sink = NULL; GstGLBuffer* gl_buffer = NULL; glimage_sink = GST_GLIMAGE_SINK (bsink); //is gl if (glimage_sink->is_gl) { //increment gl buffer ref before storage gl_buffer = GST_GL_BUFFER (gst_buffer_ref (buf)); //if glimagesink has not the display yet if (glimage_sink->display == NULL) { glimage_sink->display = g_object_ref (gl_buffer->display); if (glimage_sink->window_id) gst_gl_display_set_window_id (glimage_sink->display, glimage_sink->window_id); gst_gl_display_set_client_reshape_callback (glimage_sink->display, glimage_sink->clientReshapeCallback); gst_gl_display_set_client_draw_callback (glimage_sink->display, glimage_sink->clientDrawCallback); gst_gl_display_set_visible_context (glimage_sink->display, TRUE); } } //is not gl else { //if glimagesink has not the display yet if (glimage_sink->display == NULL) { //create a display glimage_sink->display = gst_gl_display_new (); //init opengl context gst_gl_display_create_context (glimage_sink->display, glimage_sink->width, glimage_sink->height); if (glimage_sink->window_id) gst_gl_display_set_window_id (glimage_sink->display, glimage_sink->window_id); //init colorspace conversion if needed gst_gl_display_init_upload (glimage_sink->display, glimage_sink->format, glimage_sink->width, glimage_sink->height, glimage_sink->width, glimage_sink->height); gst_gl_display_set_client_reshape_callback (glimage_sink->display, glimage_sink->clientReshapeCallback); gst_gl_display_set_client_draw_callback (glimage_sink->display, glimage_sink->clientDrawCallback); gst_gl_display_set_visible_context (glimage_sink->display, TRUE); } //blocking call gl_buffer = gst_gl_buffer_new (glimage_sink->display, glimage_sink->width, glimage_sink->height); //blocking call gst_gl_display_do_upload(glimage_sink->display, gl_buffer->texture, glimage_sink->width, glimage_sink->height, GST_BUFFER_DATA (buf)); //gl_buffer is created in this block, so the gl buffer is already referenced } //the buffer is cleared when an other comes in if (glimage_sink->stored_buffer) { gst_buffer_unref (glimage_sink->stored_buffer); glimage_sink->stored_buffer = NULL; } //store current buffer glimage_sink->stored_buffer = gl_buffer; //redisplay opengl scene if (gl_buffer->texture && gst_gl_display_redisplay (glimage_sink->display, gl_buffer->texture, gl_buffer->width, gl_buffer->height)) return GST_FLOW_OK; else return GST_FLOW_UNEXPECTED;; } static void gst_glimage_sink_xoverlay_init (GstXOverlayClass* iface) { iface->set_xwindow_id = gst_glimage_sink_set_xwindow_id; iface->expose = gst_glimage_sink_expose; } static void gst_glimage_sink_set_xwindow_id (GstXOverlay* overlay, gulong window_id) { GstGLImageSink* glimage_sink = GST_GLIMAGE_SINK (overlay); g_return_if_fail (GST_IS_GLIMAGE_SINK (overlay)); GST_DEBUG ("set_xwindow_id %ld", window_id); if (glimage_sink->window_id == window_id) return; if (window_id) glimage_sink->window_id = window_id; } static void gst_glimage_sink_expose (GstXOverlay* overlay) { GstGLImageSink* glimage_sink = GST_GLIMAGE_SINK (overlay); //redisplay opengl scene if (glimage_sink->display && glimage_sink->window_id) gst_gl_display_redisplay (glimage_sink->display, 0, 0, 0); } static gboolean gst_glimage_sink_interface_supported (GstImplementsInterface* iface, GType type) { return TRUE; } static void gst_glimage_sink_implements_init (GstImplementsInterfaceClass* klass) { klass->supported = gst_glimage_sink_interface_supported; }